Update to development versions of incrementalmerkletree/bridgetree

This modifies the tests where required to use bridgetree checkpoint
identifiers.

.gitignore

@@ -2,3 +2,4 @@
 **/*.rs.bk
 Cargo.lock
 .vscode
+action-circuit-layout.png

Cargo.toml

@@ -26,6 +26,7 @@ rustdoc-args = ["--cfg", "docsrs", "--html-in-header", "katex-header.html"]
 aes = "0.8"
 bitvec = "1"
 blake2b_simd = "1"
+bridgetree = { version = "0.2", optional = true }
 ff = "0.13"
 fpe = "0.6"
 group = { version = "0.13", features = ["wnaf-memuse"] }
@@ -52,11 +53,13 @@ image = { version = ">= 0.24, < 0.24.5", optional = true } # 0.24.5 has MSRV 1.6
 plotters = { version = "0.3.0", optional = true }
 
 [dev-dependencies]
+bridgetree = "0.2"
 criterion = "0.3"
 halo2_gadgets = { version = "0.3", features = ["test-dependencies"] }
 hex = "0.4"
 proptest = "1.0.0"
 zcash_note_encryption = { version = "0.3", features = ["pre-zip-212"] }
+incrementalmerkletree = { version = "0.3", features = ["test-dependencies"] }
 
 [target.'cfg(unix)'.dev-dependencies]
 inferno = ">= 0.11, < 0.11.15"
@@ -69,7 +72,7 @@ bench = false
 default = ["multicore"]
 multicore = ["halo2_proofs/multicore"]
 dev-graph = ["halo2_proofs/dev-graph", "image", "plotters"]
-test-dependencies = ["proptest"]
+test-dependencies = ["bridgetree", "proptest"]
 
 [[bench]]
 name = "note_decryption"
@@ -88,3 +91,7 @@ debug = true
 
 [profile.bench]
 debug = true
+
+[patch.crates-io]
+bridgetree = { git = "https://github.com/zcash/incrementalmerkletree.git", rev = "ea1686e8f8f6c1e41aa97251a7eb4fadfd33df47" }
+incrementalmerkletree = { git = "https://github.com/zcash/incrementalmerkletree.git", rev = "ea1686e8f8f6c1e41aa97251a7eb4fadfd33df47" }

src/builder.rs

@@ -759,8 +759,8 @@ impl OutputView for RecipientInfo {
 #[cfg(any(test, feature = "test-dependencies"))]
 #[cfg_attr(docsrs, doc(cfg(feature = "test-dependencies")))]
 pub mod testing {
+    use bridgetree::BridgeTree;
     use core::fmt::Debug;
-    use incrementalmerkletree::{bridgetree::BridgeTree, Tree};
     use rand::{rngs::StdRng, CryptoRng, SeedableRng};
 
     use proptest::collection::vec;
@@ -853,16 +853,15 @@ pub mod testing {
             rng_seed in prop::array::uniform32(prop::num::u8::ANY)
         ) -> ArbitraryBundleInputs<StdRng> {
             const MERKLE_DEPTH_ORCHARD: u8 = crate::constants::MERKLE_DEPTH_ORCHARD as u8;
-            let mut tree = BridgeTree::<MerkleHashOrchard, MERKLE_DEPTH_ORCHARD>::new(100);
+            let mut tree = BridgeTree::<MerkleHashOrchard, u32, MERKLE_DEPTH_ORCHARD>::new(100, 0);
             let mut notes_and_auth_paths: Vec<(Note, MerklePath)> = Vec::new();
 
             for note in notes.iter() {
                 let leaf = MerkleHashOrchard::from_cmx(&note.commitment().into());
-                tree.append(&leaf);
+                tree.append(leaf);
-                let position = tree.witness().expect("tree is not empty");
+                let position = tree.mark().expect("tree is not empty");
 
-                let root = tree.root(0).unwrap();
+                let path = MerklePath::from((position, tree.witness(position, 0).expect("we just witnessed the path")));
-                let path = MerklePath::from((position, tree.authentication_path(position, &root).expect("we just witnessed the path")));
                 notes_and_auth_paths.push((*note, path));
             }
 

src/tree.rs

@@ -11,7 +11,7 @@ use crate::{
 };
 
 use halo2_gadgets::sinsemilla::primitives::HashDomain;
-use incrementalmerkletree::{Altitude, Hashable};
+use incrementalmerkletree::{Hashable, Level};
 use pasta_curves::pallas;
 
 use ff::{Field, PrimeField, PrimeFieldBits};
@@ -205,7 +205,7 @@ impl Hashable for MerkleHashOrchard {
     ///      - when hashing two leaves, we produce a node on the layer above the leaves, i.e.
     ///        layer = 31, l = 0
     ///      - when hashing to the final root, we produce the anchor with layer = 0, l = 31.
-    fn combine(altitude: Altitude, left: &Self, right: &Self) -> Self {
+    fn combine(level: Level, left: &Self, right: &Self) -> Self {
         // MerkleCRH Sinsemilla hash domain.
         let domain = HashDomain::new(MERKLE_CRH_PERSONALIZATION);
 
@@ -213,7 +213,7 @@ impl Hashable for MerkleHashOrchard {
             domain
                 .hash(
                     iter::empty()
-                        .chain(i2lebsp_k(altitude.into()).iter().copied())
+                        .chain(i2lebsp_k(level.into()).iter().copied())
                         .chain(left.0.to_le_bits().iter().by_vals().take(L_ORCHARD_MERKLE))
                         .chain(right.0.to_le_bits().iter().by_vals().take(L_ORCHARD_MERKLE)),
                 )
@@ -221,8 +221,8 @@ impl Hashable for MerkleHashOrchard {
         )
     }
 
-    fn empty_root(altitude: Altitude) -> Self {
+    fn empty_root(level: Level) -> Self {
-        EMPTY_ROOTS[<usize>::from(altitude)]
+        EMPTY_ROOTS[<usize>::from(level)]
     }
 }
 
@@ -248,18 +248,14 @@ impl<'de> Deserialize<'de> for MerkleHashOrchard {
 #[cfg_attr(docsrs, doc(cfg(feature = "test-dependencies")))]
 pub mod testing {
     #[cfg(test)]
-    use incrementalmerkletree::{
+    use {
+        crate::tree::{MerkleHashOrchard, EMPTY_ROOTS},
         bridgetree::{BridgeTree, Frontier as BridgeFrontier},
-        Altitude, Frontier, Tree,
+        group::ff::PrimeField,
+        incrementalmerkletree::Level,
+        pasta_curves::pallas,
     };
 
-    #[cfg(test)]
-    use crate::tree::{MerkleHashOrchard, EMPTY_ROOTS};
-    #[cfg(test)]
-    use group::ff::PrimeField;
-    #[cfg(test)]
-    use pasta_curves::pallas;
-
     #[test]
     fn test_vectors() {
         let tv_empty_roots = crate::test_vectors::commitment_tree::test_vectors().empty_roots;
@@ -268,14 +264,14 @@ pub mod testing {
             assert_eq!(tv_empty_roots[height], root.to_bytes());
         }
 
-        let mut tree = BridgeTree::<MerkleHashOrchard, 4>::new(100);
+        let mut tree = BridgeTree::<MerkleHashOrchard, u32, 4>::new(100, 0);
         for (i, tv) in crate::test_vectors::merkle_path::test_vectors()
             .into_iter()
             .enumerate()
         {
             let cmx = MerkleHashOrchard::from_bytes(&tv.leaves[i]).unwrap();
-            tree.append(&cmx);
+            tree.append(cmx);
-            let position = tree.witness().expect("tree is not empty");
+            let position = tree.mark().expect("tree is not empty");
             assert_eq!(position, i.into());
 
             let root = tree.root(0).unwrap();
@@ -286,7 +282,7 @@ pub mod testing {
             // but BridgeTree doesn't encode these.
             for j in 0..=i {
                 assert_eq!(
-                    tree.authentication_path(j.try_into().unwrap(), &root),
+                    tree.witness(j.try_into().unwrap(), 0).ok(),
                     Some(
                         tv.paths[j]
                             .iter()
@@ -304,14 +300,14 @@ pub mod testing {
 
         let tv_empty_roots = crate::test_vectors::commitment_tree::test_vectors().empty_roots;
 
-        for (altitude, tv_root) in tv_empty_roots.iter().enumerate() {
+        for (level, tv_root) in tv_empty_roots.iter().enumerate() {
             assert_eq!(
-                MerkleHashOrchard::empty_root(Altitude::from(altitude as u8))
+                MerkleHashOrchard::empty_root(Level::from(level as u8))
                     .0
                     .to_repr(),
                 *tv_root,
-                "Empty root mismatch at altitude {}",
+                "Empty root mismatch at level {}",
-                altitude
+                level
             );
         }
     }
@@ -360,7 +356,7 @@ pub mod testing {
         let mut frontier = BridgeFrontier::<MerkleHashOrchard, 32>::empty();
         for commitment in commitments.iter() {
             let cmx = MerkleHashOrchard(pallas::Base::from_repr(*commitment).unwrap());
-            frontier.append(&cmx);
+            frontier.append(cmx);
         }
         assert_eq!(frontier.root().0, pallas::Base::from_repr(anchor).unwrap());
     }

tests/builder.rs

@@ -1,4 +1,5 @@
-use incrementalmerkletree::{bridgetree::BridgeTree, Hashable, Tree};
+use bridgetree::BridgeTree;
+use incrementalmerkletree::Hashable;
 use orchard::{
     builder::Builder,
     bundle::{Authorized, Flags},
@@ -70,11 +71,11 @@ fn bundle_chain() {
         // Use the tree with a single leaf.
         let cmx: ExtractedNoteCommitment = note.commitment().into();
         let leaf = MerkleHashOrchard::from_cmx(&cmx);
-        let mut tree = BridgeTree::<MerkleHashOrchard, 32>::new(0);
+        let mut tree = BridgeTree::<MerkleHashOrchard, u32, 32>::new(100, 0);
-        tree.append(&leaf);
+        tree.append(leaf);
-        let position = tree.witness().unwrap();
+        let position = tree.mark().unwrap();
         let root = tree.root(0).unwrap();
-        let auth_path = tree.authentication_path(position, &root).unwrap();
+        let auth_path = tree.witness(position, 0).unwrap();
         let merkle_path = MerklePath::from_parts(
             u64::from(position).try_into().unwrap(),
             auth_path[..].try_into().unwrap(),